Wet & Dry Risers
Our dedicated dry riser teams have over a decade of experience testing and repairing dry riser systems. All testing completed by our expert engineers is certificated and conforms to BS9990: 2006.
To ensure that all buildings and systems meet the required standards our engineers are made to have a good understanding of current regulations. This helps make sure that our clients are fully aware of their system requirements, the reasoning behind any defects and the impact that these short falls would have in a fire situation.
Free of charge surveys can be arranged upon request and advice is always available.
MJ Fire Safety offer a free survey and consultation service and work with you to ensure you have a fully operational Dry or Wet Riser installation.
Frequently Asked Questions
What is a dry riser?
A dry riser is a fire brigade system, which normally consists of a vertical pipe, which extends up through a building or structure. Connected to the pipe is an inlet breeching at ground floor level and outlet valves on each landing, usually within the fire fighting compartment.
In a fire situation the fire brigade supply water to the inlet breeching which is pushed up the main by the fire tender. The dry riser then becomes pressurised and the fire brigade will couple their hoses up to one or more of the outlet (landing) valves. The oulet valve is opened and the fire brigade have a pressured water supply to fight the fire at floor level.
What is a wet riser?
A wet riser is much like a dry riser except it is constantly full of water and pressured accordingly. Wet risers are filled straight from the towns main or by a tank with pumps that keep the pressure constant. Wet risers are normally found in high rise buildings due to the pressure required to provide water supplies to the landing valves sited on the upper floors and the time it would take to fill from empty in an emergency.
Do I need to have my dry / wet riser tested?
Yes, dry risers are required to receive a service twice a year, the first visit comprises of a complete system inspection followed by a wet pressure test. The second visit is a full system inspection and exercise of all valves.
Wet Risers are maintained in accordance with BS 9990: 2006 and BS 5588 part 12. Any pump sets connected to a wet riser should also receive regular maintenance.
For advice or to organise a service maintenance visit please contact our office.
